Type-writer mechanism.



PATENTED OUT. 29. 1907.

J. B. SEUOR. TYPE WRITER MECHANISM.

APPLICATION FILED 0015. 1908.

2 SHEETS-SHEET 1.

PATENTED OCT. 29. 1907.

i. B. SECOR. TYPE WRITER mncmmsm.

LPPLIOATIOK FILED OO'LE- 1906.

2 sums-saint 2.

ITTORNEIS UNITED STATIFZS TEXT omen TYPE-WRITER MECHANISM.

Application filed October type-bar with progressively decreasingleverage so as to afford an easy touch at the beginning and acceleratedmotion of the type-bar toward the end of the stroke.

The invention also relates to an improved construction in thefulcrum-joint of the typebars.

15. In carrying out the first part of my invention, to effectprogressively decreasing leverage with accelerating motion in tbetypebar action, I employ, in combination with a key-lever of the secondorder, that is to say; fulcrumed at its rear end. a vertical linkpivoted at bottom to th key-lever intermediately of the ends of thelatter, looped at top and having a horizontally extended bearing surfaceengaging at successive points with the horizontal arm of a bell cranksub-lever rocking on-a horizontal pivot. and the upper end of which isconnected by a link with the heel of the t ypebar,

' the form and construction of the engaging parts of the top of thevertical link and the horizontal arm of the bellfcrank being such thatin tii beginning of the downward stroke of the key-lever, the verticallink engages with the bell crank at a point remote from the fulcrumthereof and subsequently at a point nearer the fi.lcrum so thatthree-fourths (more or less) of the entire motion of the key-lever maybe expended in eficctiug the first half of the motion of the type-barand the last fourth of the key-lever stroke will effect the latter halfof the stroke of the type-bar.

In the accompanying drawing: Figure 1 is a side view of the type-baroperating mechanism of a front-strike I typewriting machine illustratingmy invention, show- 4() ing in full lines the position of the partsbefore the type-bar is moved. and in dotted lines the position of theparts at half stroke. Fig. 2 is a side view of the same parts showing infull lines their position at the end of tho slroko and indicating indotted lines the posiiion of the linger key at the beginning of thestroke and its position when one-half the movement of the typediar hashocn effected. Figs. 3, -1 and 5 are detail views. partly in sci-lion.showing the relative positions of the vertical link and the hell cranksub-lover operatcd thereby athceinningol' the stroke. at half stroke andat. the cmnplciiun of thc slrokcrespectively. ii is a sidichrvul'ion ofa typo-liar lu'ackct dclachcd. Fig/Z is a side elevation of the heelportion of typo-bar tlcizlt'llcil.

Specification of Letters Patent.

5. 1906- Serial No. 337.641.

Fig. is rcrlinil imnsvcrsc section oua larger scaliof tin tum-bar hmckctand i lrically aroun-i llu' ;|\i= in i ciill! slot 14. and the 110Patented Oct. 29, 1907.

heel of the type-bar fulcrunmd thereto. Fig. 9 is a front vibw also on alarger scale, of the vertical link and bell crank sub-lever at beginningof the stroke showing also the key-lever in transverse section.

i represents one of a set of key-levers which may be of common form and(as here illustrated) fulcrurned at the rear end on a common transversebar 2. 1 represents the fingcr-keyg-J a tension spring by which thekey-lever is drawn up after depression in printing and 4 a cushion baragainst. which the said key-lcvers are drawn and supported by saidsprings in their normal position of rest. 5 represents the customarycomb-bar by which the key levers are guided and held against lateralmotion. Y

At a suitable point between the ends of each keylever, a vertical link 6is pivotedor loosely jointed in suitable manner. A suitable connectionis illustrated in Figs. 1, 2 and 9. This link, formed as shown in Fig.9, constitutes aloop. the top 7 of which is extended in a horizontaldirection, parallel with the key-lever or in the plane or oscillation ofthe bell-crank sub-lever, with which it cooperate so as to adapt it tohear at successive points on a correspondingly err tended bearing surFee 8 of the horizontal arm 9 of bell crank sub-lever which turns on afixed pivot 11. The vertical arm 10 of the bell crank lever is formedwith a book 12 to receive the forward end of a horizontal link 13, therear end of which is pivoted at I 4t o the heel of a type-bar 1-5fulcrumed at 16 in a suitable bracket 17 mounted on the fixed bridge. 18of the frame. The fulcrum pin 16 has preferably the smooth hardenedsteel cup or washer 16 around its head to give enlarged bearing for thetype-bar.

The bracket hcrc illustrated consists of two similar cheek plates. oneof which is shown detached in Fig. 6. which conlinc between them theheel of the type-' bar 15. which is shown detached in Fig. 7. In thisFig. 7, 16' indicates the fulcrum aperture which rc coives thefulcruin-pivot-bushing. 14 the aperture in the heel for reception of thepivot attachment to the rear end of the horizontal link 13 and 16 asegment slotpermitting passage of a pin 16 having the screwthreadcdportion passing through a similarly threaded hole in one check-plate.then through the slot 16 in the typo-bar heel. and shouldered at 16 toengage 100 llN' inner wall of the other chwk-plate-thc reduced portionof the pin passing through the second choc platibeing tin-n rivctcdover. The acre may be adjust d thci-cforc lo act both as a spanning andbind-,

in screw for rhc clm-kplai1-s. holding them rigidly 105 at exactly theright distance apart.

The chcok-plalcs of the i'l'ni'livl l? and the iii-cl of th type-barwhich works ln-iwc n them are each perforaicd with ic ;i-l crin;age-rim: Hi" arranged ('umcrli l l l Q lacunae 'particularly in Figs. 6,7 and 8. By reason of these openings and the stamped recessing of thecheek plates the frictional surfaces are much reduced even though thebearing surfaces be extended to a wide radius.

The stamped recesses in the cheeks 0f the hanger surrounding the fulcrumpivot of the typebar are shown in the sectional view, Fig. 8. Theprimary objcct and effect of these recesses in the hanger-plates are toremove the surfaces from contact near the center or fulcrum. The motionis so slight near the. center that any accumulation of dirt or oil soonacts as a par tial cement rcsul ting in sluggish movement and liabilityof the bars to finally stick fast if in close contact with the hangerplates close to the fulcrum, whereas by re-.

moving the guiding contact between the typebar and hanger to a greaterradius from the fulcrum I not only provide greater lateral steadiness inthe typebars, but

by the increased arc of movement between the friction surfaces enablethem to constantly work themselves clean from dirt or viscid oil. Byarranging the guiding surface in the form of a narrow concentric bandre-" mote from the axis the typebar is steadied without being pinched bythe hangers and will run freely even though the joint be quite dirty.

Where the bearing surfaces are broad without recesscs and openings oilapplied to the joint and becoming viscid and gummy retards the freeactionof the parts.

Another important function of the registering openings referred to is tocut out and discharge any dirt which may get into the joint, thcrebkeeping the joint clean and free.

It has heretofore been proposed to aid the discharge of dirt andobstructions from the joints of the type bars by providing a series ofapertures in the bracket and using therewith a type barwith a heelsufficiently narrow to unmask or expose these apertures at eachrndvement, and providing a broad lateral bearing on one side only ofthetype bar heel.

My device differs from the above in I'oom-- pletely cover both sides ofthe type-bsr-heel between two cheek plates of which the bracket is inpart constituted and provide a. concentric series ofregisteringapertures in the heel of thetype bar and in both'cheek plates of thebracket no that at each movement of the type bar a series of aperturesare opened, extending completely through the opposite cheek plates andthe inclosed heel of the type bar. I thus provide a. hw-

ing of large radial extentwithout objectionable increase of frictionalresistance and at the 'same time i "provide for the free discharge ofdirt, lint or other nittcr which might otherwise clog the joint. Theconnection between the vertical link 6 and the horizontal arm 9 of thebell crank sub-lever by which the key-lava is made to act on thetype-bar with profromivoly dwelling leverage and accelerated modun, isbest shown in Figs. 3, 4 and 5. To permit movement betweon'the portswith minimum jrlcdoh nnd prevent relative displacement, the lioriontalbell crank arm 9 is formed at bottom with a cam shaped projection 19,hearing on a stop pin preferably the walls of the link 6 and turningfreely on its pivot 21. Beneath he top 7 of the link, a rib or lip 22projects downward inn a narrow slot, opening into an enlarged recess 23within the bell crank arm 9, so as to prevent mutual disconnectionbetween the said link and bell crank without interfering with theangular oscillatory movement of the latter.

By comparison of the several positions of the parts in successiveportions of the stroke of the key-bar, shown in Figs. 1 and 2 and therelative positions of the engaging parts shown in Figs. 3, 4 and 5, itwill be seen that at the. beginning of the stroke the vertical linkbears on the horizontal bell-crank arm 9 at a point so as to act withthe greatest leverage, affording light action to the key-lever atbeginning of the stroke and imparting at first comparatively slowmovement to the type-bar. It results that about three-fourths of thecomplete key-lover movement, 1'. 0., from the full line first to seconddotted position of the key 1'- shown in Fig. 2, will move the type-baronly 45 degrees or onehalf its complete stroke as indicated in dottedlines in Figs. 1 and 2.

The position of the mutually engaging parts of the link and bell crs'nksub-lever at this half stroke position of the type-bar is shown in Fig.4. By comparison of this with Fig. 5 showingthe position at terminationof the stroke, it will be seen that from the half leverage andaccelerated movement of the typebar, the latter half of the type-barmovement being efiected .by on; last one-fourth of the key-levermovement, or from the second dotted positions of the key 1 in Fig.-2 tothe full line position of the key-lever in said figure. 24 represents stension spring attached at 25 to the bottom of:the horizontal link 13and at 26 to a fixed point on the machine, to retract the'typo-bar 15and bell mnlr love 9, 10 to normal position when the keylever isreleased. Both springs 3 and 24 may be emoither place, the other springmay be omitted.

27 represents a spring bar to receive the impact of .the type-bar, and28 an alining stud carried thereby. 29 indicates the platen of I. frontstrike machine, in connection w ith which jlzhsve illustrated myjnvonuHaving thus described my invention, the following ,is what 1 claim isnew therein and desire to secure by 1. In a type-bu operating mechullsmfor trpewritlng machines, the combination of 1 key-lever, a link pivotedby one end to the keylewer and formed at its other end with an extendedbearing surhch. a bell crank cub-lever pivoted at its elbow on n fixedfulcrum not! having an um with a bearing surface unending longitudinallyat face lnithe end of said link, and a type-huto hich the -other armof'the boll cram: sub-m h connochd. whacthe point or contact between itand the link, nearer the tho printing stroke.

.2. In a typo-bpr'operlflng-rnmhsnhmjor mam ploye d, or, by employingaslightly stronger spring in carrying an anti-friction roller 20 confinedbetween most remote from the fulcrum ll, as shown in Fig. 3,

to the dotted line position shown in Fig. 1 or from v stroke positionthe parts coact with rapidly decreasing letters Patent.

paid arm and cooperating with the extended bearing m- I by the angularmotion or' hs bell crank sub-lever mm fulcrum of and bell crsnk ub-lovertoward the end of dlnally of said arm and cooperating with thehorizontally angular motion of the bell crank lever shifts the point oflever fulcrumed on a fixed pivot and having a substanpoint of contacttherewith of the vertical link. toward the .one end to the key-lever. abell crank sub-lever fulcrumed the first beil-crank-arm being extendedin the plane of os- 1'. in a typo-bur actuating mechanism fortypcwrltim:

machines. the combinntion'of a key-lever, a vertical link plvcted by ltslower end to the key-lever intermcdinlely ol the ends of said lever. andformed at its upper end with a horizontally extended bearing surface. ahell crnnk sublever pivoted at its elbow on a fixed fulcrum and having ahorizontal arm'with a bearing surface extending lollgii'lr extendedbearingsurface in the uppcr'end of said vertical link, a link Jointed atone end to the other arm of tlic bell crank lever, and a type-bar to theheel of which the. other end ofthe last namedJink is pivoted. wherebythe contact between it and the vertical link. nearer the folcrum of saidbell crank lever toward the end of the print.-

lng stroke.

in a type-bar actuating mechanism for typewriting machines. thecomhinutlonof a key-lever, a link jointed at on a fixed pivot and havingone'arm on which the said link acts and another arm transmittingmovement to tile type-bar, the cooperating bearing surfaces of the linkand cillation of the bell crank lever, whereby the angular mo tion ofsaidbell crank lever shifts the point of Contact of the link therewithtoward the fulcrum as the stroke prograsses; and means for preventingthe relative displace ment of these cooperating parts in the printingstroke, substantially as described.

4. In a type-bar actuating mechanism for type'w ritlnz machines, thecombination of a key-lever, a vertical link jointed at its lower end tothe key-lever. a bell crank subtlaily horizontal arm on which thevertical link acts and a substantially vertical arm transmittingmovement to the type-bar, the coiiperating bearing surfaces of thevertical link and horizontal beli-c'rank arm being extended in the planeof oscillation of the bell crank lever, whereby the angular motion ofsaid bell crank lever shifts the fulcrum as the stroke progresses; andmeans for preventin: the relative displacement oi these cooperatingparts. substantially asdescribed.

5. id; type-bar actuating mechanism for typewriting machines; thecombination of a key-lever. a link pivoted at one end to the key-loverand having at its other end a bearing surface extended in the plane ofoscillation of the.

bell crank suhlever with which it codperntes, a bell-crank sub-leverfulcrumed at its elbow on a fixed pivot and having one arm with anextended bearing surface cooperating with the extended bearing surfaceof the link so as to shift the contact point between said bearingsurfaces to ward the fulcrum of the sub-lever by the angular motion ofthe latter; a rib on one of. the said bearing surfaces and a recess inthe other bearing surfaca'into which said rih projects to prevent therelative displacement of the parts in operation, substantially asdescribed.

6. in u type-bar actuating mechanism for typewritlngmachlncsfthecombination of a key-lever, a vertical llnk pivoted at itslowerend to the key-lever and having :it its upper end a bearing surfaceextended horizontally in the plane of oscillation of the bell'crnnksub-lever with which it coiiperates, a bell crank sulrlever fuicrumed atits elbow on n fixed pivot and having a horizontal arm with on extendedbearing surface coiipcratlug with the extendedbearlng surface of thelink so as to shift the contact point between snid bearing surfacestoward the fulcrum of the sub-lever by llie angular motion of thelatter. a rib on one of the said bearing surfaces and n recess in theother bearing surface into which said rib projects to prevent therelative displacement of the parts in operation, subslantlally asdescribed.

machines. the combination of a key-lever. a link pivoted by mend to thekey-lever a looped at its other end formin two parallel walls, n llcrank sulrlever hnvim: one arm receivai within the looped upper end ofs'nld link and actuated thereby. a rib on one of these coiiperalingmembgva projecting into a recess in the other member to prove'nt theirrelative displacement in a horizontal direc-' tlon. means for confiningthe said bcll crank arm length:

Wise of the linkto prevent separation of said confining rib and recess.type-bar and connecting menus between the second arm of the bell-crankand the type-bar, for actuating the latter.

S. in a type-bar actuating mechanism for typeu'r tiu:

machincs. the combination of akcy-lever. a substantially vertical linkpivoted by its lower end to the kcy l'evcr and having a looped upper endform ng two parallel walls. a bell crnnk sub-lever having asubstantially hovlznntnl m'nl rcccived within the looped upper end ofsold link and actuated thereby a rib on one of these cooperating membersprojecting into a recess in the other member to pre vent their relativedisplacement in a horizontal dircrr tion and lncuns for confining thesold l-cll (rank arm -rtically in the link to prcvcnt scpnration of saidconfining rib and rcrcss.

9. in a type-liar actuating mechanism for lypeu'rltlnzz machines. thecombination of n key-lever. a link joiniod nt one end to the key-leverand looped at its ntlu'l' end. :1 bell crank lever having one arminclosctl in tho luupcd cm] of said link. :i rib projecting inward fromthe end of the looped link into a rcccss in the bell crnnk arm topvi-vcnl relative movcmcnf lrnnsvcrsciy to the link and a transverse pinin the loop ci-iipornting with n protnlm-nnce on the bell-crnnk-arm toprevent displacement of the parts longitudinally of the link \vililepermitting oscillatory movement of the bell crnuk. substnniiuily usdescribcd.

it). in n typc-l-zlr actuating mechanism for ly wivrlilng machincs. thecombination of a key lever. u. substantially vertical link jointed atits lower end to the key-lever and having n looped upper cud. :i bellcrnnk lever having a substantially horizontal arm inclosed in the loopcduppcl' ehd of said link. a rib projci-iingdownward from the top of thelooped link into a recess in tin.- lmll-crank-nrm to prevent relativehorizontal movement and a transverse pin in the loop coiipcruting with nprotuberance on the V bottom of the beibcrunk-nrm to prevent vertical(lispluccmerit of the parts while permitting osclllniory movement of thol -crnnk-lever,' substnntinlly as described.

11. in a type-bar actuating mechanism for typcwrltlng machines, thecombination of a key lever, :1 link jointed by one end to the keylevernnd'formed at its other end with a loop providing within its extremity ubcznlng surface extended in the plume otfloscillatlon of the bell-cranklever \vii'l which said link cooperates, a bell-crank sub-lever havingone arm inclosed in the loop of said link and bar-- ing an extendedbearing surface cooperating with that within the extremity of the loopso that the angular motion of the bell crank lever causes the point ofcontact between the link and bell crnnk lever to nppvonch the fulcrum ofthe latter dun-inn the progress of the stroke. :1

recess in one of the cooperating members and n rib on the other enteringsaid recess to prevent relative displacement of said coiiperailng partsin a direction transverse to the "link, on anti-friction roller pivotedwithin the loop and cooperating with a protuberance on thebell-crnnk-urm to prevent displacement of the ports longitudinally ofthe .link while permitting the oscillatory motion of the bell cranklever and n type-bar with which the second arm of the bell crank leveris connected.

12. in u type-bar mechanism for typcwritlng machines. the type-bnrhunger having cheek-plates affording fulcrum support for the type-burbetwcen them and n separating and binding screw engaging bothclicck-plntes,.subsinutinlly as describod.

13. in a typo-bar mechanism for typeu'riling machines, the type-burhunger having cheek-plates nlfol'ding fulcrum support for the type-barbetween them and a separating and binding screw having screw-threadedcngnggnucni with one clleckplaie and having rotatory suppor but holdfrom longitudinal movement in the other chock-plate. substantially nodescribed.

14. in a type bar mechanism for iypcvvriling machines. the cmublnallonof a hunger and a typo lslr pivoted lhcrcin. live fluid hanger and theheel of the typo bur being ioolh provided with amt-lures :xt'rnngwl onarcs concentric with the fulcrum so as to 'rcgislcr with and pass oneanother in the movement of the typo bar in Ol'dli lo cut out anddischarge dirt from the joint. substantially as dlscribed.

15. in a type bar mechanism for lypcwriling nu inc-t -in' the movementof the type bur, substantially us dothe combination of a hangerconstructed with a. pair of check-platcs and :1 type bar pivotedtherein. the heel of the type bur being embraced between the cheekplates of the hunger and. the said hanger and the heel of the type bnrbeing provided with apertures urrangcd equidistantiy from the fulcrumcenter. 50 as to register in the movement uf the type bnr in order tocut out and discharge dirt from the Joint, substnntiaily us described.

16. in a type bur mechanism for typewriilng machines. 5 the combinationoi. a hunger constructed with n pair of cheek-plates having an interiorrecess. and a type our \vhcse heel is pivoted in said hunger unden'ibruccd between then L'hPPkplntQr. ther of, the said check-plates ofthe hunger nnd the heel 0: the type bur being provided with registeringapertures uduptcd to cut out and dischnrue dirt 17. In at type barmechunism for type-. citing machines the cunbinntion of n ype but und ahunger thcrcfiur. mid hunger and the heel of the type bar being bothprovided with rczistering upertnrcs and the apertures in at least 1 oneof said members being urrnnged in a series concentric with the pivot onwhich the type bur \rurks, to rcduce'trictlnn and i'ucilltnte thedischarge of dirt from tlm'jolnt suhsnmtialiy as described.

in. in u t 'pe'bnr mechanism for typewritiug machines.

with check plates etnhruclng the heel oi the type-bur and between whichit-ie pivcted, the said type-bur heel and hi'inger cheeks being providedwith registering upcriurse and the (apertures n uL least one 01! saidmembers being arranged in n se ies ccncentric'with the pivot of thetypebut to reduce friction and facilitate the discharge of dirt in themovement of the type-hnr,'substnntiul1y as described. I I

19. in a type'nnr mechanism for typewriting machines, the combination ofa typebnr and a hanger therefor having registering apertures 01 thetypebnr end said hunger 1m ving on its face adjacent to the typebur unannular recess surrounding the pivot: nd n concentric guiding surfacefor the typebar remote iron". the z'ulcrum center, subsznntiaily asdescribed.

20. in a typubar metiuinisi'ii 1'01: typewritlng machines, thecombination of n typebur rind a hanger constructed with check piuicsembracing the heel of the typehnr and i erwccn which it is pivoted, saidtypebar und hunger being both provided with apertures for discharge ofdirt in the movement oi the typehur, and the hanger-cheeks having ontheir inner faces adjacent to the typcbnr recesses surrounding the pivotand providing concentric bearing suriures for the typchur remote fromthe fulcrum-center, subntnntiuiiy us ticscribvd. I

21. in :i typcbnr mechanism Idr typewriting machines, the combinationwith u. rypcbnr of u fulcrum hanger therefor formed of sheet mctul \vllhcheek-plates embracing the tyiwlxll' hccl on both sides and havingstamped in their inner fut-es annular recesses forming concentricguiding surfaces for the typehnr remote from the fulcrumcenter,mlimtnntiniiy as described.

JEROME Bi FECOR.

Witnesses F. L. Osrnnnoun'r. G. A. ALLINGHAM,

for dlschnrge'ot dirt n the movement 7

